tpm: Require a digest source when extending the PCR
This feature is used for measured boot, so we can add a log entry to the
TCPA with some information about where the digest comes from. It is not
currently supported in the TPM drivers, but add it to the API so that
code which expects it can signal its request.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
index 1bf6278..6058f2e 100644
--- a/lib/tpm-v2.c
+++ b/lib/tpm-v2.c
@@ -157,6 +157,8 @@
};
int ret;
+ if (!digest)
+ return -EINVAL;
/*
* Fill the command structure starting from the first buffer:
* - the digest